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Subordination by convex functions
oleh: Rosihan M. Ali, V. Ravichandran, N. Seenivasagan
Format: | Article |
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Diterbitkan: | Wiley 2006-01-01 |
Deskripsi
For a fixed analytic function g(z)=z+∑n=2∞gnzn defined on the open unit disk and γ<1, let Tg(γ) denote the class of all analytic functions f(z)=z+∑n=2∞anzn satisfying ∑n=2∞|angn|≤1−γ. For functions in Tg(γ), a subordination result is derived involving the convolution with a normalized convex function. Our result includes as special cases several earlier works.